New test.

From-SVN: r35740

gcc/testsuite/ChangeLog

+2000-08-15  Richard Henderson  <rth@cygnus.com>
+
+	* gcc.c-torture/execute/20000815-1.c: New test.
+
 2000-08-15  Joseph S. Myers  <jsm28@cam.ac.uk>
 
 	* gcc.dg/c90-array-lval-2.c, gcc.dg/c90-const-expr-2.c,

gcc/testsuite/gcc.c-torture/execute/20000815-1.c

+struct table_elt
+{
+  void *exp;
+  struct table_elt *next_same_hash;
+  struct table_elt *prev_same_hash;
+  struct table_elt *next_same_value;
+  struct table_elt *prev_same_value;
+  struct table_elt *first_same_value;
+  struct table_elt *related_value;
+  int cost;
+  int mode;
+  char in_memory;
+  char in_struct;
+  char is_const;
+  char flag;
+};
+
+struct write_data
+{
+  int sp : 1;			 
+  int var : 1;			 
+  int nonscalar : 1;		 
+  int all : 1;			 
+};
+
+int cse_rtx_addr_varies_p(void *);
+void remove_from_table(struct table_elt *, int);
+static struct table_elt *table[32];
+
+void
+invalidate_memory (writes)
+     struct write_data *writes;
+{
+  register int i;
+  register struct table_elt *p, *next;
+  int all = writes->all;
+  int nonscalar = writes->nonscalar;
+
+  for (i = 0; i < 31; i++)
+    for (p = table[i]; p; p = next)
+      {
+	next = p->next_same_hash;
+	if (p->in_memory
+	    && (all
+		|| (nonscalar && p->in_struct)
+		|| cse_rtx_addr_varies_p (p->exp)))
+	  remove_from_table (p, i);
+      }
+}
+
+int cse_rtx_addr_varies_p(void *x) { return 0; }
+void remove_from_table(struct table_elt *x, int y) { abort (); }
+
+int
+main()
+{
+  struct write_data writes;
+  struct table_elt elt;
+
+  __builtin_memset(&elt, 0, sizeof(elt));
+  elt.in_memory = 1;
+  table[0] = &elt;
+
+  __builtin_memset(&writes, 0, sizeof(writes));
+  writes.var = 1;
+  writes.nonscalar = 1;
+
+  invalidate_memory(&writes);
+  return 0;
+}